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Four easy routes to the Lorentz transformations: addendum to ‘Lorentz transformations and the wave equation’
In this paper I briefly discuss and compare four easy derivations of the Lorentz transformations. Two of these derivations assume the invariance of the Minkowski spacetime interval in inertial frames and the other two assume the invariance of the d'Alembert operator in these frames. These derivations are suitable for a …